/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.plugin.task.dvc;

import static org.apache.dolphinscheduler.plugin.task.api.TaskConstants.EXIT_CODE_FAILURE;

import org.apache.dolphinscheduler.common.utils.JSONUtils;
import org.apache.dolphinscheduler.plugin.task.api.AbstractTask;
import org.apache.dolphinscheduler.plugin.task.api.ShellCommandExecutor;
import org.apache.dolphinscheduler.plugin.task.api.TaskCallBack;
import org.apache.dolphinscheduler.plugin.task.api.TaskException;
import org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext;
import org.apache.dolphinscheduler.plugin.task.api.model.TaskResponse;
import org.apache.dolphinscheduler.plugin.task.api.parameters.AbstractParameters;

import java.util.ArrayList;
import java.util.List;

/**
 * shell task
 */
public class DvcTask extends AbstractTask {

  /**
   * dvc parameters
   */
  private DvcParameters parameters;

  /**
   * shell command executor
   */
  private ShellCommandExecutor shellCommandExecutor;

  /**
   * taskExecutionContext
   */
  private TaskExecutionContext taskExecutionContext;

  /**
   * constructor
   *
   * @param taskExecutionContext taskExecutionContext
   */
  public DvcTask(TaskExecutionContext taskExecutionContext) {
    super(taskExecutionContext);

    this.taskExecutionContext = taskExecutionContext;
    this.shellCommandExecutor = new ShellCommandExecutor(this::logHandle, taskExecutionContext, logger);
  }

  @Override
  public void init() {
    logger.info("dvc task params {}", taskExecutionContext.getTaskParams());

    parameters = JSONUtils.parseObject(taskExecutionContext.getTaskParams(), DvcParameters.class);

    if (!parameters.checkParameters()) {
      throw new RuntimeException("dvc task params is not valid");
    }
  }

  @Override
  public void handle(TaskCallBack taskCallBack) throws TaskException {
    try {
      // construct process
      String command = buildCommand();
      TaskResponse commandExecuteResult = shellCommandExecutor.run(command);
      setExitStatusCode(commandExecuteResult.getExitStatusCode());
      setProcessId(commandExecuteResult.getProcessId());
      parameters.dealOutParam(shellCommandExecutor.getVarPool());
    } catch (InterruptedException e) {
      Thread.currentThread().interrupt();
      logger.error("The current DvcTask has been interrupted", e);
      setExitStatusCode(EXIT_CODE_FAILURE);
      throw new TaskException("The current DvcTask has been interrupted", e);
    } catch (Exception e) {
      logger.error("dvc task error", e);
      setExitStatusCode(EXIT_CODE_FAILURE);
      throw new TaskException("Execute dvc task failed", e);
    }
  }

  @Override
  public void cancel() throws TaskException {
    // cancel process
    try {
      shellCommandExecutor.cancelApplication();
    } catch (Exception e) {
      throw new TaskException("cancel application error", e);
    }
  }

  public String buildCommand() {
    String command = "";
    String taskType = parameters.getDvcTaskType();
    if (taskType.equals(DvcConstants.DVC_TASK_TYPE.UPLOAD)) {
      command = buildUploadCommond();
    } else if (taskType.equals(DvcConstants.DVC_TASK_TYPE.DOWNLOAD)) {
      command = buildDownCommond();
    } else if (taskType.equals(DvcConstants.DVC_TASK_TYPE.INIT)) {
      command = buildInitDvcCommond();
    }
    logger.info("Run DVC task with command: \n{}", command);
    return command;
  }

  private String buildUploadCommond() {
    List<String> args = new ArrayList<>();
    args.add(String.format(DvcConstants.CHECK_AND_SET_DVC_REPO, parameters.getDvcRepository()));
    args.add(String.format(DvcConstants.SET_DATA_PATH, parameters.getDvcLoadSaveDataPath()));
    args.add(String.format(DvcConstants.SET_DATA_LOCATION, parameters.getDvcDataLocation()));
    args.add(String.format(DvcConstants.SET_VERSION, parameters.getDvcVersion()));
    args.add(String.format(DvcConstants.SET_MESSAGE, parameters.getDvcMessage()));
    args.add(DvcConstants.GIT_CLONE_DVC_REPO);
    args.add(DvcConstants.DVC_AUTOSTAGE);
    args.add(DvcConstants.DVC_ADD_DATA);
    args.add(DvcConstants.GIT_UPDATE_FOR_UPDATE_DATA);

    String command = String.join("\n", args);
    return command;

  }

  private String buildDownCommond() {
    List<String> args = new ArrayList<>();
    args.add(String.format(DvcConstants.CHECK_AND_SET_DVC_REPO, parameters.getDvcRepository()));
    args.add(String.format(DvcConstants.SET_DATA_PATH, parameters.getDvcLoadSaveDataPath()));
    args.add(String.format(DvcConstants.SET_DATA_LOCATION, parameters.getDvcDataLocation()));
    args.add(String.format(DvcConstants.SET_VERSION, parameters.getDvcVersion()));
    args.add(DvcConstants.DVC_DOWNLOAD);

    String command = String.join("\n", args);
    return command;

  }

  private String buildInitDvcCommond() {
    List<String> args = new ArrayList<>();
    args.add(String.format(DvcConstants.CHECK_AND_SET_DVC_REPO, parameters.getDvcRepository()));
    args.add(DvcConstants.GIT_CLONE_DVC_REPO);
    args.add(DvcConstants.DVC_INIT);
    args.add(String.format(DvcConstants.DVC_ADD_REMOTE, parameters.getDvcStoreUrl()));
    args.add(DvcConstants.GIT_UPDATE_FOR_INIT_DVC);

    String command = String.join("\n", args);
    return command;

  }

  @Override
  public AbstractParameters getParameters() {
    return parameters;
  }

}
